crank case pressure

[CenPen777]

I ran Rawze's manometer test on my3/2013 model 2350 isx 600 460,000 miles and at idle the level of separation was 5" and at 1500 rpms it went down to 2.5". That being said, I have plenty of power and no noticable problems other than oil consumption ,3 gallons in 10,000, and the smell of burning engine oil when coming to a stop. No exterior oil leaks. My next step is to get an oil analysis. I still think this is an odd result. Any ideas ( If this is the wrong thread for this please Redirect me, thanks).